test/systemd.unit.create: add new options to test

Add the new options to the b.json test and update the diff.

The new file has the following contents:

[Unit]
Description=Create directory
DefaultDependencies=False
ConditionPathExists=|!/etc/myfile
ConditionPathIsDirectory=|!/etc/mydir

[Service]
Type=oneshot
RemainAfterExit=True
ExecStart=mkdir -p /etc/mydir
ExecStart=touch /etc/myfile
Environment="DEBUG=1"
EnvironmentFile=/etc/example.env

[Install]
WantedBy=local-fs.target
RequiredBy=multi-user.target

test/data/stages/systemd.unit.create/b.json

@@ -635,6 +635,15 @@
                 "ExecStart": [
                   "mkdir -p /etc/mydir",
                   "touch /etc/myfile"
+                ],
+                "Environment": [
+                  {
+                    "key": "DEBUG",
+                    "value": "1"
+                  }
+                ],
+                "EnvironmentFile": [
+                  "/etc/example.env"
                 ]
               },
               "Install": {

test/data/stages/systemd.unit.create/b.mpp.yaml

@@ -49,6 +49,11 @@ pipelines:
               ExecStart:
                 - mkdir -p /etc/mydir
                 - touch /etc/myfile
+              Environment:
+                - key: "DEBUG"
+                  value: "1"
+              EnvironmentFile:
+                - "/etc/example.env"
             Install:
               WantedBy:
                 - local-fs.target

test/data/stages/systemd.unit.create/diff.json

@@ -2,10 +2,28 @@
   "added_files": [],
   "deleted_files": [],
   "differences": {
+    "/etc/pki/ca-trust/extracted/java/cacerts": {
+      "content": [
+        null,
+        null
+      ]
+    },
     "/etc/systemd/user/create-directory.service": {
       "content": [
         "sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-        "sha256:b6ea3cdc2ca7cd0a3c623869003cc4c68c17ccaa8eacacb17af34c3df05f89d4"
+        "sha256:69aa663d58cc063ea2d7659ac06354335c26e69e8fdb0036f952b082a70b5642"
+      ]
+    },
+    "/usr/lib/sysimage/rpm/rpmdb.sqlite": {
+      "content": [
+        null,
+        null
+      ]
+    },
+    "/var/cache/ldconfig/aux-cache": {
+      "content": [
+        null,
+        null
       ]
     }
   }